Behenyl has a very special thickening property to allow the final product to have a more desirable and spreadable texture. Whilst opacity and thickness can be seen as a matter of persona preference, Behenyl alcohol enhances the spreadability of the final product and thus the effectiveness of the final cosmetic formulations.
The safety of Behenyl alcohol for use in cosmetics was considered in the Cosmetic Ingredient Review Volume 7, Number 3, 1988: https://www.cir-safety.org/sites/default/files/115_buff3a_suppl.pdf which found Behenyl alcohol safe for use in cosmetic use. In 2005, the Expert Pant of the Cosmetic Ingredient Review considered new data on Behenyl alcohol and confirmed the conclusion that Behenyl alcohol is safe for use in a cosmetic application.
Behenyl alcohol helps to retain skin moisture, improving the hydrated look of the ski, forming a natural protective layer. Behenyl alcohol does not leave a greasy feel after application in the way other emollients can, instead leaving the skin feeling soft and hydrated.
Behenyl alcohol acts an emollient in hair care products, helping to increase the moisture content in the hair and improve manageability. When used in hair care formulas, Behenyl alcohol can be used to increase the slip of hair and thus Behenyl alcohol is useful in detangling hair care formulations.
Behenyl alcohol is compatible with most other cosmetic ingredients in cosmetic formulations and as such can be used as a co-emulsifier with other emulsifiers to increase stability and skin feel. Behenyl alcohol tends to have a stabilising effect on emulsions.
Behenyl alcohol is a vegan ingredient, derived from vegetable sources.